Everything is fine, the charger is set to 13.8 and that is the value the battery will reach. You have a fully charged battery. 13.8 is a conservative value and will charge your battery, and with the 120 min boost duration, the constant voltage period, will get to full.
But, because of the flat discharge curve of LiFePO4 batteries you can't go by the resting voltage to get the state of charge other than knowing if the voltage is 13.3V or higher the battery is full or close to it and if the voltage is 12.5V the battery is fully discharged or real close to it, which I will demonstrate in a minute.
If lithium batteries have been deeply discharged they should be charged at a very low rate until they reach their minimum voltage above which they can accept the usualy high currents. So this sounds like a protection feature to me to prevent damage. ... but your batteries should never be seeing a low voltage disconnect event!
If the voltage doesn’t exceed 13.5v that’d be a bit weird and counterintuitive to having a boost voltage of 14.4. Think of it like if the battery is below 14.4v the controller will throw as much wattage as possible at the battery.
Any voltage In between gives the user no info as to how charged the battery actually is because the voltage curve of Po4 is so flat except for the top or bottom ends. 13.2v for example could mean you have 20% left or 80% left in the battery. There's no way to tell without having a shunt that tracks every amp hour put in and taken out of the pack.
You have a fully charged battery. 13.8 is a conservative value and will charge your battery, and with the 120 min boost duration, the constant voltage period, will get to full. Boost Charging Volt (V):13.8V, an OK value for a low stress charge, set to 13.9 or 14.0 for a slightly faster charge time.
LiFePo4 max out at 13v. Have I been hosed?
I''ve tried solar charging and Renogy Lifepo4 charger and these batteries only charge to 13.0, 13.1, 13.2 volts. Is this okay or have I been hosed? Not necessarily, since those are a bit lower than a rested "settled" voltages.
Learn More
How To Fix Lithium Battery Not Charging
If you''re experiencing issues with your lithium battery not charging, there are a few easy troubleshooting tips you can try. Let''s dive in and see what might be causing your power problems and what you can do about it. How Do Lithium Batteries Charge? LiFePO4 batteries require a battery management system (BMS) to monitor the status of the batteries. What this …
Learn More
Lithium Battery usage
If a lithium battery is left to rest (not on a charger) it will return to its nominal voltage which is 13.1-13.2ish. The Victron BMV 712 uses 3 factors to determine state of charge (SOC). #1 Charged Voltage
Learn More
Battery Won''t Charge over 13.9V | DIY Solar Power Forum
Everything is fine, the charger is set to 13.8 and that is the value the battery will reach. You have a fully charged battery. 13.8 is a conservative value and will charge your battery, and with the 120 min boost duration, the …
Learn More
Resting 12v Battery Voltage Reading Is 13.2v; What Am I Missing ...
Hoping someone can help me to understand. I bought a boat last year that has 4 145ah Calcium Lead-Acid Sealed batteries.Their charging is controlled by a smart battery management system (bulk/absorption/float) both on the solar side and the shore power side. We are liveaboards and are relatively energy intensive because of our laptops. We rarely go below …
Learn More
Battery voltage never goes above 13.4V. Is this a …
Your battery is badly imbalanced and one cell is hitting a protection voltage way early and causing the bms to disconnect the input mosfets (which to the CC …
Learn More
How to get the state of charge on a lithium or LiFePO4 battery?
So how can you know the state of charge of a LiFePO4 battery? The only accurate way is with an AH meter. An amp hour meter measures the amount of amp hours …
Learn More
How to get the state of charge on a lithium or LiFePO4 battery?
So how can you know the state of charge of a LiFePO4 battery? The only accurate way is with an AH meter. An amp hour meter measures the amount of amp hours used. So if you have a 100AH battery and the meter shows you have 70 amp hours left it''s a no brainer, you know your battery is seventy percent charged.
Learn More
Measuring Voltage on Lithium Batteries
When the protection unit opens this V- B- circuit, even though the lithium battery may be fully charged, battery terminals B+ and B- may show only 2-3 V or even nil on a multi-meter. (capacitors hold small voltage). How could this occur you may ask? It is not uncommon to see a lithium battery "over charged". I have seen this with the more ...
Learn More
Battery read 13.4 volts but BMS reads 13.1
My BMS reads more or less directly off the battery, The USB port reads from the fuse box, and the shunt measures from close to the battery, but is affected by load. At full …
Learn More
LiFePo4 max out at 13v. Have I been hosed?
I''ve tried solar charging and Renogy Lifepo4 charger and these batteries only charge to 13.0, 13.1, 13.2 volts. Is this okay or have I been hosed? Not necessarily, since …
Learn More
Battery Won''t Charge over 13.9V | DIY Solar Power Forum
Everything is fine, the charger is set to 13.8 and that is the value the battery will reach. You have a fully charged battery. 13.8 is a conservative value and will charge your battery, and with the 120 min boost duration, the constant voltage period, will get to full. I recommend you change some of the values:
Learn More
FYI: Lithium batteries charges at 13.6 to 13.8v is normal.
My Shorai lithium battery died today. I towed my bike home and charged the battery for 5min. Started the bike to see if what kind of voltage I was getting and only was at …
Learn More
Resting 12v Battery Voltage Reading Is 13.2v; What Am I Missing ...
Results are: 13.1 and 13.21 on the two "bad" batteries and 13.23 on the good battery. My understanding is that the resting voltage should fall somewhere between 12.9 and …
Learn More
Battery voltage between 13.6
I charged each battery to 14.4, then float brought it down to 13.6, did that to the 2 betteries. The third one I charged to 14.4, then did not wait for the float voltages to bring it back down to 13.6. The 2 batteries that had …
Learn More
Car Battery Reads 13 Volts But Won''t Start -What To Do -2024
A battery with a voltage of at least 12.4 volts is advised to guarantee a dependable start. Battery reads 12.6 volts but wont start is due to: Failing Battery: The battery shows fully charged but car won''t start, check all fuses and check the battery with a voltmeter. These elements may make it less able to deliver enough power to start the ...
Learn More
Resting 12v Battery Voltage Reading Is 13.2v; What Am I Missing ...
Results are: 13.1 and 13.21 on the two "bad" batteries and 13.23 on the good battery. My understanding is that the resting voltage should fall somewhere between 12.9 and 11.5 volts (I know it can vary on either end), and I had planned to roughly estimate the remaining capacity based on that range, but um, my voltage is too high?
Learn More
Lifepo4 battery dropping voltage suddenly after taking off float
I have a Victron smartsolar mppt 100|20 connected to a brand new 100ah lifepo4 battery (12.8v nominal, make is cfe 1280S). I have set the preset to lithium lifepo4 and …
Learn More
Lithium Battery usage
If a lithium battery is left to rest (not on a charger) it will return to its nominal voltage which is 13.1-13.2ish. The Victron BMV 712 uses 3 factors to determine state of …
Learn More
Solar Charge Controller displays different voltage than at battery
I keep seeing lower from my AGM car batteries. They may have a parasitic load. I''ve sometimes topped them. When I pull out and repurpose I do an equalization charge. I see the Renogy which says 12.7V also shows a battery icon not full. It takes hours to completely charge that battery. Got a technical manual for your battery? Here''s mine:
Learn More
Why Is My Lithium Battery Not Charging ...
Lithium batteries require a BMS (bat t ery management system) to monitor the status of the batteries. This vital piece of equipment helps ensure that the batteries only charge when the conditions are safe for charging. No matter how you''re charging your lithium batteries, you must avoid charging them when temperatures are below freezing. Because lithium …
Learn More
